Steel retainer



May 18 1926."- 1,584,767

c. c. HANSEN STEEL RETAINER Filed July 10, 1925 INVENTOR fiaaies ara e Hi3 ATI' V chine.

Fatented May 18, 1926.

CHARLES C. EANSEN,OF EASTON, @EllllSYLVANIA, ASSZGNQB- IQ INGERSOLL-RAND COMPANY, OE JERSEY CETY, NEW JERSEY, A. CORPGRATION 033 NEW' JERSEY.

STEEL RETAIN Application filed July 10, 1925. Serial No. 42,645.

This invention relates to steel retainers, but more particularly to that type of retainer which may be secured to the front end of a rock drill to cooperate with a collar formed on the working implement for preventing ejection of the implement from the machine. y

it is an object of this invention to produce rugged steel retainer of simple design which is inexpensive tomanufacture and ef- :icient inoperation.

Other objects will be in part obviousand in part pointed out hereinafter.

The invention consists of the combinations of elements, features of construction, and arrangement of parts having the general mode of operation, substantially as hereinaftcr described and more particularly pointed out'in the appended claims and illustrated in the accompanying drawing, in which Figure l is a side view of the front end of a rock drill showingv the retaining memher in retaining position,

' Figure 2 is a front view of a rock drill showing the retaining member in retaining position, and

Figure 3 is a pe spective view of the retaining member.

Referring to the drawing, the invention is shown applied to a rock drill, only the front end of which is shown for purposes of illustration and in which a front head A is provided with lugs B having apertures C to receive suit-able side bolts (not shown) for securing the front head A to the ma- In this instance, the front head A 'is centralized with respect to the machine by means of a front cylinder washer D, only a part of which is shown. Disposed within the front head is drill steel E havinga collar F formed thereon for limiting the travel of the drill steel into the front head. frunnions G are in this instance formed on opposite sides of the front head A and are offset from the longitudinal axis of the machine.

In accordance with the present invention, a one-piece retainingmember H, formed to partly encircle the front headahas a pair of projections K at one end which are provided with suitable bearings L in the form of slots for the member H. The bea ings L are preferably so formed as to fit loosely .the collar F. In this manner,

over the trunnions G which in this instance serve as apivotal support for the member H.

In order to prevent accidental ejection of the drill steel E from the front head A while the drill is in operation, a yoke O is formed at the front end of the member H to embrace the drill steel E in advance of if the machine is withdrawn whilo the percussive element is in operation, the drill steel E may be forced forwardly out of the path of the hammer piston, but since the yoke "forms a stop for the collar F, the shank end of the drill steel E will remain in the front head A in readiness for a succeeding operation. V v

To the end that the member H may be constantly held in the position shown in Figures 1 and 2, a lug P is formed on each side of the member H to extend beyond the side of the front head A when the member H is in retaining'position. The lugs P are preferably provided with holes Q, extending therethrough to receive a pin B. One end of the pin R is provided with a head S which serves as a convenient grip for the operator to insert said pin within the holes Q. A. bulb T is formed on the opposite end of the pin R to prevent endwise movement of said pin within the holes Q. In this instance, cross slots U are cut longitudinally through the bulb to form spring fingers V for the pu pose of permitting the bulb T to pass through the holes Q.

Suitable means areiprovided for preventing longitudinal movement of the member H with res ect to the trunnions G. To this end, a bolt W is inserted transversely through each projection K and is provided with a suitable nut X for securing said bolt in position. The bolt W is preferably so arranged with respect to the trunnion G that when the member H and the bolt are in position, the bolt will contact with the trunnion G and thus form one side of the hearing;

In the operation of the device, if it is desired to remove or insert the drill steel,

the pin B may be withdrawn from the lugs P and the member H may then beroclred on the trunnions G to the position shown in dot and dash lines in Figure '1. It will be observed that in this posit-ion, the yoke O of the retaining member H is withdrawn from the path of the collar F and the steel may then pass the end of said yoke.

If desired, the pin R may be removed only from one lug and may then be moved longitudinally until the bulb T contacts with the inner face of the other lug. In this way the pin is prevented from contacting with the side of the trout head A when the member H is rocked on the trunnions G and the pin R will be in readiness for insetion in the opposite lug when the member H is again placed in retaining position.

The advantages of this invention reside in the simplicity of construction and consequently itis inexpensive to manufacture and to maintain. A further advantage is that this construction permits of a rugged retaining; member. capable of withstanding the rough usage to which devices of this' character are ordinarily subjected.

I claim:

1. In a steel retainer for rock drills, the combination of a trout head \vi h a collared implement inserted into the front head, trunnions on the front head and otl'set from the longitudinal axis of the machine,v a retaining member supported by he trannions, and u'ieans ins rtable transverse through the retaining member to cooperate with the front head for holding said member in retaining position.

In a steel retainer for rock drills, the combination of a front head with a collared implement inserted into the front head, a pair of trunnions on the front head and ottset from the longitudinal axis of the machine, a retaining member supported by the trunnions, lugs on opposite sides of said member, and means inset-table transversely through said lugs to cooperate with the front head for holding said member in retaining position.

In a steel retainer for rock drills, the combination of a front head with a collared drill steel supported slidabl by the front. head, a pair of trunnions on the front head and otl'sct from the longitudinal axis of the machine, an oscillatory retaining member, hearings on the member to cooperate with the trunnions for supporting saidlllQlnljl, lugs on opposite sides or .iid member, and a removable pin insertable transversel through said lugs to cooperate with a side of the front head for holding said member in retaining position.

at. In a steel retainer for rock drills, the combination of a front head with a drill steel inserted slidablv into the front head, a collar formedon said drill steel, a pair of opposed t-runnions on the front head and otlset from the longitudinal axis of the machine, an oscillatory retaining member, a

'tion, a halo on one pair of bearings at one end of the member to cooperate with the trunnions for supporting the member, a yoke at the other end of the member to embrace the drill steel in advance of the collar for preventing ejection of the steel from the front head, lugsformed on opposite sides of said member between the bearings and the yoke, and a removable pin inserted slidabl through said lugs cooperating with a side of the trout head for holding said member in retaining. position.

In a steel retainer for rock drills, the combination of a front head with a drill steel inserted slidablv into the front head, a collar formed on said drill steel. a pair of opposed trunnions on the front head and onset from the longitudinal axis of the machine, an oscillatory retaining member, a pair of bearings at one end of the member to cooperate with the trunnions for supporting the member. a yoke at the other end of the member to embrace the drill steel in advance ot' the collar tor in'eventing ejection ol the steel from the fronthead, a pair of hr formed on said member between the bearings and the yoke, a removz ble pin inserted slidably through said lugs cooperating with a side of the front head for holding said member in retaining position, a bulb on one end of said pin to prevent, endwise movement of said pin, and spring lingers to permit the passage of the bulb through said lugs.

.5. in a steel retainer 'lor rock drills, the combination of a front head with a drill steel inserted slidably into the front head, a collar formed on said drill steel, :1 pair of opposed trunnions otl'set from the longitudinal axis of the machine, an oscillatory rctainine' mem er partly encircling the tront heed. a pair oi bearings at one end of the member to cooperate with the trunnions for supporting the member, a yoke at the other end of the member to embrace the steei in advance of the rollar tor preventing ejection oil the steel from the trout head. bolts ranged transversely through the bearings and cooperating with the trunnions to hold the memhei fast longitudinal movement, a pair of lugs termed on said member between the bearings and the yoke. a removable pin inserted slidably through said lugs cooperating with a side of the front head l'or holding said member in retaining posiend of said pin to preventeudwise movement of said pin, and spring lingers to permit the hiss-age oi the bulb through said lugs.

In testimony whereof I. have signed this specification.

()IIARLES (J. HANSEN. 

